Developer Donald Trump talks with his former wife Ivana Trump during the men's final at the U.S. Open September 7, 1997. REUTERS/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

From left, Billy Crystal, host of the 76th annual Academy Awards, his wife Janice Goldfinger, Melania Knauss and her boyfriend Donald Trump, pose together as they leave the Vanity Fair Oscar party at Morton's restaurant in West Hollywood, California, early March 1, 2004. REUTERS/Ethan Miller/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

Donald Trump, president of the Trump Organization, pauses before the U.S. Senate Committee on Homeland Security and Governmental Affairs subcommittee during a hearing on "U.S. Financial Involvement in Renovation of U.N. Headquarters" on Capitol Hill in Washington July 21, 2005. REUTERS/Molly Riley/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

Donald Trump (C), entrepreneur and host of the television reality series "The Apprentice", poses with his wife and children Donald Trump Jr.(L), Tiffany Trump (2nd L), Melania (2nd R) and daughter Ivanka at the party following the live telecast of the finale of season five in Los Angeles, California June 5, 2006. REUTERS/Fred Prouser/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

Donald Trump talks to reporters at a news conference where he presented a proposal that the Twin Towers of the World Trade Center be rebuilt, in New York May 18, 2005. REUTERS/Jeff Christensen/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

Donald Trump poses across the street from the job site of the Trump International Hotel and Tower Chicago after a news conference in Chicago May 10, 2006. REUTERS/Stephen J. Carrera/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

Donald Trump holds a replica of his star on the Hollywood Walk of Fame as his wife Melania holds their son Barron in Los Angeles, January 16, 2007. REUTERS/Chris Pizzello/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

Republican presidential nominee Donald Trump views a replica of the Oval Office on a tour of the Gerald Ford Presidential Museum in Grand Rapids, Michigan, U.S. September 30, 2016. REUTERS/Jonathan Ernst/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

Entrepreneur Donald Trump, host of the NBC television reality series "The Apprentice", says his catch line from the show as he arrives at a casting call for the sixth season of the show at Universal Studios Hollywood in Los Angeles March 10, 2006. REUTERS/Fred Prouser/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

Donald Trump answers questions during an interview about his new book with co-author Robert Kiyosaki, "Why We Want You to Be Rich", at his office in New York City October 9, 2006. REUTERS/Lucas Jackson/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

U.S. property mogul Donald Trump holds a golf club during a media event on the sand dunes of the Menie estate, the site for Trump's proposed golf resort, near Aberdeen, Scotland, Britain May 27, 2010. REUTERS/David Moir/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

Real estate magnate Donald Trump waves as he leaves a Greater Nashua Chamber of Commerce business expo at the Radisson Hotel in Nashua, New Hampshire, May 11, 2011. REUTERS/Don Himsel/Pool/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

Republican U.S. presidential candidate Donald Trump shows off the size of his hands as rivals Marco Rubio (L) and Ted Cruz (R) look on at the start of the U.S. Republican presidential candidates debate in Detroit, Michigan, March 3, 2016. REUTERS/Jim Young/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

Republican U.S. presidential candidate Donald Trump poses for a photo after an interview with Reuters in his office in Trump Tower, in the Manhattan borough of New York City, U.S., May 17, 2016. REUTERS/Lucas Jackson/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

Republican U.S. presidential nominee Donald Trump (L) greets vice presidential nominee Mike Pence after Pence spoke during the third day of the Republican National Convention in Cleveland, Ohio, U.S. July 20, 2016. REUTERS/Mike Segar/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

U.S. Republican presidential candidate Donald Trump reacts to an answer his wife Melania gives during an interview on NBC's "Today" show in New York, April 21, 2016. REUTERS/Brendan McDermid/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

U.S. Republican presidential nominee Donald Trump waves to supporters as he arrives at a campaign rally, in Prescott Valley, Arizona, U.S., October 4, 2016. REUTERS/Mike Segar/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

U.S. Republican presidential candidate Donald Trump makes his way through the crowd after addressing a Tea Party rally against the Iran nuclear deal at the U.S. Capitol in Washington September 9, 2015. REUTERS/Jonathan Ernst/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

U.S. Republican presidential candidate, real estate mogul and TV personality Donald Trump holds up his financial statement showing his net worth as he formally announces his campaign for the 2016 Republican presidential nomination during an event at Trump Tower in New York June 16, 2015. REUTERS/Brendan McDermid/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

U.S. Republican presidential candidate, real estate mogul and TV personality Donald Trump poses with his family after formally announcing his campaign for the 2016 Republican presidential nomination during an event at Trump Tower in New York June 16, 2015. REUTERS/Brendan McDermid/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

Real estate developer Donald Trump prepares to go on stage to speak during the Freedom Summit in Greenville, South Carolina May 9, 2015. REUTERS/Chris Keane/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

Republican U.S. Presidential nominee Donald Trump holds a Purple Heart given to him during a campaign event at Briar Woods High School in Ashburn, Virginia, U.S., August 2, 2016. REUTERS/Eric Thayer /File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

U.S. Republican presidential candidate Donald Trump reacts as he is introduced during a campaign event in Concord, North Carolina March 7, 2016. REUTERS/Chris Keane/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES

U.S. Republican presidential candidate Donald Trump hugs a U.S. flag as he takes the stage for a campaign town hall meeting in Derry, New Hampshire August 19, 2015. REUTERS/Brian Snyder/File Photo FROM THE FILES PACKAGE "THE CANDIDATES" - SEARCH CANDIDATES FILES FOR ALL 90 IMAGES